* {
  padding: 0;
  margin: 0;
}

em,
i {
  font-style: normal;
}

ul,
ol,
dl {
  list-style: none;
  margin-top: 0;
  margin-bottom: 0 !important;
}

li {
  list-style: none;
}

input,
textarea {
  border: 0;
  outline: 0;
}

p {
  margin-bottom: 0 !important;
}

dd,
dl {
  margin-bottom: 0 !important;
}

/*统一的宽度*/
.w {
  width: 1200px;
  margin: 0 auto;
}

button {
  border: 0;
}

.hiddenBox {
  display: none;
}

.showBox {
  display: block;
}

/*隐藏多余的文字*/
.hiddenText {
  overflow: hidden;
  text-overflow: ellipsis;
}

img {
  vertical-align: top !important;
}

/*flex布局的垂直和水平居中*/
.centerLocation {
  display: flex;
  justify-content: center;
  align-items: center;
}

/*首页每个模块的位置*/
.video-item,
.teacher-item {
  margin-top: 5px;
  padding: 10px 3px;
}

.first {
  margin-left: 0 !important;
}

/*取消router-link的样式*/
a {
  text-decoration: none !important;
  color: #4f555d !important;
}

/*每个页面的盒子*/
.MainPageHeader {
  margin-top: 70px;
}

/*用户头像的公共样式*/
.userImg {
  position: relative;
  width: 48px;
  height: 48px;
  cursor: pointer !important;
}

.userImg img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
}

/*搜索栏的样式*/
.searchMain {
  display: flex;
  position: relative;
  align-items: center;
}

.searchMain .searchImage {
  position: absolute;
  cursor: pointer;
  z-index: 999;
}

.searchMain .searchInputBox {
  width: 100%;
  font-feature-settings: "tnum";
  color: #000000d9;
  font-size: 14px;
  font-variant: tabular-nums;
  line-height: 1.5715;
  list-style: none;
  margin: 0;
  padding: 0;
}

.searchMain .searchInputBox .searchInputMain {
  padding: 5px 0;
  border-radius: 119px;
  background-color: #fff;
  border: 1px solid #d9d9d9;
  position: relative;
  overflow: hidden;
}

.searchMain .searchInputBox .searchInputMain .inputType {
  margin-left: 10px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  width: 167px;
}
/*公共的头部*/
.webHeader{
  top: 0;
  position: fixed;
  display: flex;
  justify-content: center;
  background: white;
  min-width: 100%;
  height: 60px;
  box-shadow: 0 0 5px #d7d7d7;
  z-index: 1000;
}
.webHeader .headerMain{
  position: fixed;
  display: flex;
  min-width: 1080px;
  line-height: 60px;
}

/*用户未登录*/
.userNotLogin{
 text-indent: 20px;
 font-size: 18px;
}